To provide a metallic container, particularly a fuel tank made of steel, by which the metallic container can be improved, the flange does not act as an obstructive element, the assembling space of the fuel tank is not increased more than need, in comparison with a real tank volume, and the tank volume can be increased, and to provide a process for manufacturing the metallic container, by which the volume of the fuel tank can be increased by removing the dead space occupied by the flange.

A plurality of wall parts 14, 15 of a container 1, adjacent to a bond flanged, are curved in a direction of an edge face of the bond flange 6. Further the deformation working of the container 1 is performed after the welding, and at least one of the wall parts 14, 15 adjacent to the welded flange 6, is outwardly deformed in the deformation working.